I recently started a seasonal summer position, because my usual position is not running for 3 months of the year. I got hired in and stated that my availability would be 8-5. They're trying to talk me into 6-12 (which the amount of hours doesnt bother me, I just cannot work at 6 am). How do I professionally say that I can't work at 6 am because I dont wanna get up that fucking early nor should I have to when I stated my availability.